Road finishing apparatus



L. GARDNER ROAD FINISHING APPARATUS 4 Sheetsl-Sheet. l

Filed Jan. 25

- NVENTQK. x0/7 Gard/wwf ATTORNEYS.

Jam 39 1193 n L, GARDNER ROAD FINISHING APPARATUS Filed Jan. 25, 1952 4 Sheezs--SheeJ 2 A TTOR/VEYS.

Jan 3, E935.; l.. GARDINER ROAD FINISHING APPARATUS Filed Jan. 25, 1932 4 Sheets-Sheet 4 98 l INVENTOR. fo/7 Gard/7er A T TORNEYS.

Patented Jan. 8, 1935 UNITED STATES PATENT OFFICE ROAD FINISHING APPARATUS corporation of Ohio Application January 25, 1932, Serial No. 588,590

19 Claims.

My invention relates to road nishing apparatus. It has to do, primarily, with an apparatus that is especially suitable for finishing v bitumen roads wherein the cost of construction .5 must necessarily be somewhat limited.

The method which is now commonly used in building low cost roads of the type indicated consists in spreading gravel or crushed stone over the surface of the road by means of trucks or spreader boxes, applying a coat of bitumen by means of an oil distributor and then blading this material back and forth by means of a blade grader, until this material is so coated that the bitumen bonds the gravel or crushed stone together and to the surface to which the material has been applied.

One disadvantage of this method is that the work is carried on by several successive operations, namely, the spreading of the stone, the coating with bitumen, the blading of the coated stone and the nal rolling of the road. Another disadvantage arises from the fact that the road produced is not as smooth as desired, while the gravel and stone is not thoroughly coated, which makes the material as a whole lack uniformity of coating throughout.

The lack of smoothness is due to the fact that the truck and blader, in spreading the stone and nally smoothing it, naturally follow the unevenness of the old road surface. The use of forms on low cost roads is practically prohibited by the cost of these forms and the initial expense of grading and then setting the forms. Yet, without these forms, the finishing apparatus, riding upon the uneven contour of the road, has hitherto resulted in an uneven road finish.

One of the objects of my invention is to provide a road finishing apparatus which will effectively finish the surface of the road to any 4o predetermined thickness without the aid of roa'd forms.

Another object of my invention is to provide an apparatus that will finish the surface of the road to an even, smooth nish, regardless of the contour of the old road or the surface upon which the material is being applied or upon which the apparatus is traveling.

Another object of my invention is to provide a machine that will effectively finish a road surface to proper contour and also to proper width without the use of forms and with a consequent saving in the expense of providing and setting such forms.

In its preferred form, my invention .contemplates the provision of a structure which is movable along a road or a surface to be finished as a road, and which carries a screed unit in combination with a means for indicating to the operator' the proper elevation and angle of the screed unit with relation to the surface being 5 finished. It further comprises, in combination therewith, a means for delimiting the road which is preferably in the form of a pair of automatically adjustable blades which are mounted to travel in advance of the screed unit and crowd the nishing material adjacent the edges of the road surface laterally inward where it will be subjected to the oncoming screed.

In this preferred form, the screed is mounted for automatic transverse reciprocation during its advance over the newly deposited material. Furthermore, the screed unit is bodily. adjustable, vertically and this adjustment may be effected while maintaining the screed unit level or while tilting one end thereof more than the other, so as to meet any conditions which may arise in the finishing operation. In addition, the screed is so mounted upon the screed unit that it may be adjusted to dispose the lower surface thereof at any angle which may be considered desirable for effecting adequate compression ofA the material over which it travels.

The preferred embodiment of my invention is shown in the accompanying drawings wherein similar characters of reference designate correspending parts and wherein:

Figure l is a perspective view of my road iinishing machine.

Figure 2 is a plan view of my machine.

Figure 3 is a side elevation of my machine, partly broken away.

Figure -4 is a perspective view showing the adjustable feature of my screed carrier.

Figure 5 is a. front view of my apparatus diagrammatically shown.

Figure 6 is a side elevation of a modified form of my apparatus.

In the drawings, my invention is shown as comprising a main frame 1 made up of side channel irons 2 and 3, which are bolted together with end beams 4 and 5. This framework is further strengthened by means of additional diagonal members 6 as best shown in Figure 2. This frame constitutes the main body portion of my road finishing machine, that is adapted to carry the power unit and further carry my adjustable screed member.

The framework just described is preferably supported by means of rear wheels 7 and 8 which are supported in suitable bearings (not shown).

The forward end is further supported by endless traction members 9 and 10, that are secured to' the frame in a suitable manner. The power unit and driving mechanism is supported by means of suitable beam structure 11, centrally located on the main framework 1.

Across the front of the main frame 1, I have arranged a means for carrying an adjustable screed unit 12, which is so designed as to permit the screed to be quickly adjusted on either side, regardless of the position of the main frame.

The purpose of this adjusting means is to enable the operator to correct any defect that may occur as the apparatus passes over rough or uneven ground. l

The means for supporting this unit comprises an I-beam 13 that extends substantially across the front of the main frame. This I-beam 13 carries, adjacent each end thereof, a pair of upstanding channels 14, 15, 16 and 17, respectively, and which are connected to said I-beam and held in upright position by means of angle clips 18. Disposed between the units of each pair of channels, intermediate their length and secured thereto, I have provided channel members 19 and 20. These channel members act as stiffeners and are designed to have suspending rods pivotally connected thereto, as will be described subsequently.

The unit just described constitutes the main supporting means for the screed and is slidable in contact with the main frame. This is made possible by mounting tongues 21, 22, 23 and 24 on the inner fianges of the vertical channels which are slidable in grooves 25, 26, 27 and 28. These grooves are disposed in a fixed relation to the front of the main frame, thus permitting slidable adjustment of the supporting unit in a vertical path.

A means for holding the screed unit in a suspended position comprises castings 29 bolted to the central portion of each `of these channels 19 and 20. To these castings are pivoted the lower ends of vertical rods 30, these parts being held together by means of pivot bolts. The upper ends of the rods 30 are threaded as at 31.

The main frame 1 is further provided with an elevated framework 32 that is adapted to carry the adjusting means for the screed. This adjusting means preferably comprises hand wheels 33 keyed to stub shafts 34 that are adapted to be supported by bearing standards 35. Keyed to the opposite ends of stub shafts 34 are bevel gears 36 that are adapted to mesh with bevel gears 37, keyed to horizontal shafts 38.

These horizontal shafts are also carried by means of bearing standards 35 and 39. Bevel gears 40 are keyed to horizontal shafts 38 and mesh with bevel gears 41. The bevel gears 41 are internally threaded and mounted upon the threaded portions 3l of the rods 30 for raising or lowering such rods. It will be seen that I have provided a means for adjusting the hanging screed unit to any desired height, by the turning of hand wheels 33. The rotation of bevel gears 41 pulls the screed unit up or down by means of the threaded ends 31 of the rods 30, which pass through the internally threaded portion of the gears 4l.

My adjustable screed unit just described is further provided with forwardly extending brackets that are adapted to serve as a means for carrying the screed in a suspended position. These bracket units consist of forwardly projecting arms 42, bolted to the backs of the upstanding supports 14, 15, 16 and 17. I have further provided upwardly and forwardly inclined angles 43 that are secured to the lower ends of the said upstanding supports.

The forward extremities of these upwardly and forwardly inclined angles 43 are horizontal and are adapted to carr'y beams 44, which act as trackways from which the screed is suspended for reclprocation, transversely of the machine. Beams 44 are further held rigid by means of the forwardly extending arms 42 which are bolted to the upper side of the beams 44.

The screed member 12 which extends substantially across the front of the machine comprises an upper member 45, taking the shape of an inverted L (Figure 4). This member is adapted to form the upper face of the screed and is preferably designed to carry a series of screed irons 46 on the lower end thereof. Upper member 45 is further provided with a narrow flat top 47 and integrally depending therefrom is a narrow flange 48, which' top strengthens the above mentioned member 45.

Screed irons 46 are provided with a substantially wide horizontal base 49 whose rear edge extends upwardly to form a narrow flange 50. This flange prevents the bending of the base 49. The forward edge of base 49 is rearwardly and upwardly inclined as at 51, to form a V-shaped cross section. The irons 46 are further provided with a vertically extending portion 52, having slots 53 therein.

These screed irons 46 are bolted to the upper member 45 by means of bolts 54 which pass through slots 53 and holes 55 formed in upper member 45. It will be seen that the said irons may be adjusted to any height or angle. This adjusting means enables one to further adjust the screed irons to conform with the proposed crown of the road.

My screed member 12 is preferably held in a suspended position by means of straps 56, whose lower ends are bolted to the upper portion of the upper member 45 and whose upper ends embrace the track beams 44. I have further provided between the upper portion of straps 56, pairs of rollers 57 which travel upon the track member 44 and hold the screed in a suspended position, for reciprocation transversely of the machine. 'Ihese rollers 57 are provided with stub axles 58 that extend through holes 59 formed on the straps 56. It will be seen that I have provided means whereby the screed may be reciprocated transversely of the machine with the rollers 57 riding upon the beams 44.

As shown best in Figure 4, screed 12 is further provided, upon its rear, with a series of supporting members. These supporting members are preferably disposed vertically between the horizontal flange of the upper portion and the base 449 of the screed irons. They provide a means are secured rigidly upon the upper surface of P the screed base 49. Extending rearwardly from the upper and lower ears 61, I have provided radius rods 64, that converge rearwardly and are secured to swivel connections 65, supported by means f castings 66, that are rigidly connected to beam 13 of the adjusting screed frame. These radius rods comprise turnbuckles 64 and serve to hold the screed adjustably on the main frame of my structure, and further act as braces for the screed when it meets resistance from the material to be finished. One purpose of the turnbuckles on the radius rods is to provide a means for adjusting the tilt of the screed so that when passing over the material, said screed may compress the newly laid material.

The screed frame is further provided with aprons 6 7 that are located on each side of the machine, extending from a point slightly in the rear of the screed and flaring outwardly and forwardly for two or three feet. These aprons 67 are preferably bolted to the forward ends of bars` extend outwardly from the.supporting bracket of the screed. They are suitably braced by means of diagonal cross-bars 72. One purpose of these substructures is to carry the movable apron bars 68. Another purpose'is to carry arms 73 that extend forwardly and over the aprons 67.

These forwardly extending arms 73 are adapted to have secured to their outer ends depend- .ing forks 74, which serve as guides for the aprons 67. It will be seen that the aprons provide a means for holding the loose material within a prescribed area, which insures a straight finished road-edge. The forked members 74 further hold the aprons 67 from possible side motion and also guide same as they ride over the uneven contour of the road.

I further provide a guiding means whereby the operator may correct any deviation that may occur in the proposed elevation of the screed, by means of quickly adjusting either end of the screed unit. This guiding means comprises horizontally extending arms 75 (Figure l) which are bolted to arms 73. The arms 75 extend laterally and forwardly over the portion of the road that is not to be surfaced.

Depending indicators 76 extend downwardly from the extreme outer ends of the arms 75. The points of these indicators are disposed slightly in advance of the screed, and are adapted to follow indicating lines or cords 77. The height of these lines is determined by the 'advancing engineers so that the operator may adjust his screed to conform to the proposed surface of the road.

The road finishing machine may be driven by any suitable mechanism. The endless traction members 9 and 10 and the means for reciprocating the screed are all driven from the same motor 78 that is preferably mounted upon the suitable base structure 11 which forms part of the main frame 1. Spur pinion 79 keyed to the motor shaft meshes with gear 80 that is keyed to shaft 81. This shaft carries intermediate its length a sprocket 82 which drives the differential 83 through the medium of chain 84 and sprocket 85 which is keyed to the diferential shaft 86, as best shown in Figure 2. y

It will be seenthat extending from each side of the diierential housing 83, I have provided suitable shafting 87, to whose adjacent ends are keyed sprockets 88. Mounted intermediate the length of shafts 87 are suitable friction clutches 89, that are adapted to retard or stop either side of the differential by means ot suitable controls. This action permits the operator to guide the road finishing machine in accordance with the lines that are stretched along both sides of the road.

The endless traction members are adapted to be driven by means of shafting 90, mounted within suitable bearings, and having their opposite ends provided with sprockets 91 keyed thereon. Sprockets 91 are driven by sprockets 88, by means of chains 92.

The reclprocation of the screed is preferably controlled by means of the driving mechanism through the medium of shaft 8l, that is connected to suitable gears mounted within a housing 93. The screed is connected to gear mechanism 93 by means of an arm 94 that is pivotally connected to a bracket 95 mounted on the upper side of the screed plate 45 and substantially to one side of the center of the screed. The opposite end of arm 94 is connected to a crank 96, that rotates, which causes the screed to reciprocate transversely of the machine.

The forward end of my apparatus consists of a reciprocating strike-off blade or screed, and side aprons which tend to embrace the material and hold it within the proposed road surface. The face of the screed member pushes the material forward and also allows a certain amount to be passed between the lower edge and the old road surface or sub-grade.

After the proper amount of material has been spread, the screed produces a new surface which is governed by keeping the indicators 76 at the level indicated by the chalk lines 77. The chalk lines 77 govern the strike-off height of the screed and also govern the proposed course of the road.

The aprons that are mounted in front and along each side of the apparatus hold the loose material within a given area and also direct same inward, because of their flaring sides.l By means of the radius rods 64, the bottom of the screed 49 may be given a slight upward and forward tilt, thus permitting thematerial to pass thereunder, and further receive an initial compaction which reduces the amount of nal rolling, thus lowering the cost of the operation.

In the operation of my apparatus, piano wires or chalk lines are stretched along both sides of theroad, either before or after the bitumen covered gravel or crushed stone has been roughly spread upon the road surface by means of spreader boxes. My apparatus is then caused to travel along the road with its screed in reciprocation while in compressive contact with the roughly spread material. In advance of the screed, the side plates or aprons travel along the edge of the road and both delimit the road and crowd the edged material over into the path of travel of the advancing screed, with these plates or aprons automatically raising or lowering to accommodate the contour of the old road. 'Ihe operator regulates the elevation of the screed unit by adjusting either or both ends thereof. He

also properly adjusts the screed upon the screed unit to maintain the proper angle thereof by means of the turnbuckle structure. He also observes the indicators which travel in proximity to the wires or chalk lines and gauges the elevation of his screed unit to insure that either or both ends of the screed are of such height to conform to the nnished grade, irrespective of the positions which the caterpillars may take, due to the unevenness of the surface on which they travel, which is preferably beyond the limits of the road.

The modified form 'of my invention, which is shown in Figure 8, embodies a road finishing apparatus wherein the subframe carrying the screed unit and associated parts is disposed intermediate the traction members of the vehicle, instead of being disposed in front thereof. In this modified form, there is provided a framework 97, which is preferably supported at four points by means of endless traction members 98. The screed unit 99 is carried upon a subframe 100 and this subframe also supports aprons 10i which are of a structure and mounting substantially identical with the aprons shown in Figure 1.

It will be apparent that, in this structure, the location of the screed, between the endless traction members of the device, produces a structure wherein the irregularities of the surface over which the traction members operate will have a minimum effect upon the' action of this screed. In other words, when the `forward or rear traction members travel over uneven surfaces, the rise and fall of the screed member is minimized, both on account of the location of the screed member with relation to the traction members and on account of the pivotal mounting of these traction members.

It will beseen from this that I have provided a novel and extremely simple device whereby a road may be finished to'proper contour without the use of side forms, with a consequent great saving in cost. It will also be apparent that my apparatus is entirely self-contained, in that the screed, the road delimiting members and the level determining members are all carried by the traveling apparatus. Of course, it will be apparent that endless traction members arenot necessary, and that flat wheels riding on planks, channels or the like, may be substituted therefor, without departing from my invention.

It will also be apparent that other forms of screeds or strike-olf members may be used, although I find it desirable to utilize the screed tilting apparatus to maintain the compressive action of the screed, in spite of elevation changes. For example, a vertically adjustable strike-oli blade may, if desired, be substituted for my screed.

The term strike-oft' blade as used in the claims of this application is intended to include screeds and similar devices.

Having thus described my invention, what I claim is:

1. Apparatus of the class described comprising a framework, traction members on which said framework is mounted, a vertically adjustable screed unit, means for vertically adjusting said screed unit relative to said framework and holding it in any position to which it is adjusted, a screed member carried by said screed unit, and means for adjusting said screed member about its own longitudinal axis relative to the screed unit.

2. Apparatus of the class described comprising a framework, traction members for carrying said framework, a vertically adjustable subframe carried by said framework, means for vertically adjusting said subframe relative to said framework and for holding it in any position to which it is adjusted, and a road finishing member tiltably adjustable on said subframe.

3. Apparatus of the class described comprising a framework, traction members for carrying said framework, a vertically adjustable screed unit, means for vertically adjusting said screed unit relative to said framework and holding it in any position to which it is adjusted, a screed carried thereby, and means for regulating the tilt of said screed, regardless of the vertical adjustment of said screed unit.

Apparatus of the class described comprising a framework, traction members for carrying said framework, a vertically adjustable screed unit, means for vertically adjusting said screed unit relative to said framework and holding itV in any position to which it is adjusted, a screed carried thereby, means for varying the angle of said screed to compensate for vertical adjustment of said screed unit, and independently adjustable screed irons on said screed.

5. Apparatus of the class described comprising a framework, traction members for can'ying said framework, a strike-off member, means for vertically adjusting either end of said strike-off member, and level indicators for indicating the desired level of said strike-off member, said level indicators projecting from the sides of said apparatus and being adapted to cooperate with level indicating means arranged along each side of the surface being finished.

6. Apparatus of the class described comprising a framework, traction members for carrying said framework, a strike-off member, means for vertically adjusting said strike-off member, an indicating means for indicating the desired level of said strike-off member and the desired path of travel of said framework, said indicating means being adapted to cooperate with level indicating means disposed at the side of the surface being treated.

7. In combination withline members disposed at a predetermined level, a road surfacing apparatus comprising .traction members adapted to -travel'outside of the surface being treated, a

main framework carried on said traction members, a subframework carried on said main framework, a strike-onf member carried by said subframework, means for vertically adjusting said subframework, means for tilting said strike-off member about its own longitudinal axis relative to said subframework, level indicating means on said subframework and extending into cooperative relation with said line members for indicating the desired level of said strike-off member, and automatically adjustable road delimiting members carried by said subframework and operating yin conjunction with said strike-off member.

8. In combination with line members disposed at a predetermined level, a road surfacing apparatus comprising traction members adapted to travel outside of the surface being treated, a main -framework carried on said traction members, a subframework carried on said main framework,

va strike-oil member carried by said subframework, means for vertically adjusting said subframework, level indicating means on said subframework and extending into cooperative relation with said line members for indicating the desired level of said strike-off member, and means for reciprocating said strike-off member transversely of said subframework.

9. In combination with line members disposed at a predetermined level, a road surfacing apparatus comprising traction members adapted to travel outside of the surface being treated.

a framework carried on said traction members, a strike-oil member mounted on said framework, means for vertically adjusting said strike-oi! member, indicating means adjustable with said strike-off member and extending into cooperative relation with said line members for indicating the desired level of said strike-oil.' member, road delimiting members independently adjustable of said strike-off member and operating in commotion therewith, and means for reciprocating said strike-oil` member transversely of said framework.

10. Apparatus of the type described comprising a main framework, traction members for carrying said framework, said traction members being adapted to operate outside of the surface bein'g treated and at each side thereof, means for driving the traction members at one side of said surface at a different speed than the traction members at the other side of said surface so that the apparatus may be guided, a subframe carried at the forward end of said main framework, means for adjusting either end or both ends of said subframe' relative to said main framework and for holding it in any position to which it is adjusted, a screed member suspended from said subframework, said screed member having adjustable means thereon for determining the crown of the surface to be produced, means for tilting said screed member about its own longitudinal axis relative to said subframework to all practical working positions regardless of the vertical position of said subframe, means for reciprocating said screed member transversely relative to said subframe regardless of the vertical position of said subframe, road delimiting members carried by said subframe and disposed along the ends of said screed member in cooperative relation therewith, said road delimiting members having outwardly flared forward ends and being mounted in such a manner that they will automatically float up and downto take care of any variations in the surface being treated, indicating members carried by said subframe and extending from each side of said apparatus, said indicating members being adapted to cooperate with level indicating and guiding means disposed along the side edges of the surface being treated.

l1. Apparatus of the type described comprising a framework, traction members for carrying said framework, said traction members being adapted to operate outside of the surface being treated and at each side thereof, a subframe carried by said main framework, means for vertically adjusting either end or both ends of said subframe relative to said m'ain framework and for holding it in any position to which it is adjusted, a screed member suspended from said subframe, said screed member having adjustable means thereon for determining the crown of the surface to be produced, means for tilting said screed member about its own longitudinal axis relative to the ground to all practical positions regardless of the vertical position of said subframe, means for reciprocating said screed member transversely relative to said subframe regardless of the vertical position of said subframe, road delimiting members carried by said subframe and disposed in cooperative relation with said screed member, said road delimiting members being mounted in such a manner that they are automatically adjustable, indicating members carried by said subframe and extending out past the sides of said apparatus, said indicating members being adapted to cooperate with level indicating and guiding means disposed along the side edges of the surface being treated.

12. Apparatus of the type described comprising a framework, traction members for carrying said framework, a subframe carried by said main framework, means for vertically adjusting said subframe relative to said main framework and for holding it in any position to which it is adjusted, a screed member carried by said subframe, means for tilting said screed member about its own longitudinal axis relative to said subframe to all practical working positions regardless of the vertical position of said subframe, means for reciprocating said screed member transversely of the subframe regardless of the vertical position of said subframe, road delimiting members carried by said subframe and disposed in cooperative relation with said screed member, indicating members carried by said subframe and extending out past the sides of said apparatus, said indicating members being adapted to cooperate with level indicating and guiding means disposed along the side edges of the surface being treated.

13. Apparatus of the type described comprising a framework, traction members for'carrying said framework, a subframe carried by said main framework, means for vertically adjusting said subframe relative to said main framework and for holding it in any position to which it is adjusted, a screed member carried by said subframe, means for tilting said screed member about its own longitudinal axis relative to said subframe to all practical working positions regardless of the vertical position of said subframe, means for reciprocating said screed member transversely of the subframe regardless of the vertical position of said subframe, road delimiting members carried by said subframe and disposed in cooperative relation with said screed member.

14. Apparatus of the type described comprising a main framework, traction members at each side thereof for carrying said framework, said traction members being adapted to operate outside of the surface being treated and at each side thereof, means for driving said traction members at one side thereof at a different speed than the traction members at the other side thereof so that the apparatus may be guided, a'

screed member carried by said framework, means for adjusting either end or both ends of said screed member, said screed member having adjustable means thereon for determining the crown of the surface to be produced, means for tilting said screed member about its own longitudinal axis relative to the ground to all practical working positions regardless of its vertical position, means for reciprocating said screed member transversely of the framework regardless of the vertical position of said screed member, road delimiting members carried by said framework and mounted in such a manner that they are automatically adjustable, indicating members adapted to indicate the height of said screed member and to aid in guiding the apparatus, said indicating members extending from the apparatus and cooperating with level indicating and guiding members disposed at the sides of the surface being treated.

15. Apparatus of the type described comprising a main framework, traction members for carrying said framework, a screed member carried by said framework, means for adjusting said screed member vertically relative to said framework, means for tilting said screed member about its own longitudinal axis relative to the ground to all practical working positions regardless of its vertical position, means for reciprocating said screed member transversely of the framework regardless of the vertical position of said screed member, road delimiting members carried by said framework and mounted in cooperative relation with said screed member, indicating members adapted to indicate the height of said screed member and to aid in guiding the apparatus, said indicating members extending from the apparatus and cooperating with level indicating and guiding members disposed at the sides of the surface being treated.

16. Apparatus of the type described comprising a main framework, traction members for carrying said framework, a screed member carried by said framework, means for adjusting said screed member vertically relative to said framework, means for tilting said screed member about its own longitudinal axis relative to the ground to all practical working positions regardless of its vertical position, means for reciprocating said screed member transversely of the framework regardless of the vertical position of said screed member, and road delimiting members carried by said framework and mounted in cooperative relation with said screed member.

1'7. Apparatus of the type described comprising a framework, traction members for carrying said framework, said traction members being disposed at the sides of said apparatus and being adapted to operate outside of the surface being treated at each side thereof, means for driving the traction members at one side of said apparatus at a different speed than the traction members at the other side of said apparatus so that the apparatus may be guided, and indicating members extending from said apparatus and adapted to cooperate with members extending along the side edges of the surface being treated to aid in guiding said apparatus along the desired course.

18. Apparatus of the type described comprising a framework, traction members for carrying said framework, said traction members being disposed at the sides of said apparatus and being adapted to operate outside of the surface being treated at each side thereof, means for driving the traction members at one side of said apparatus at a different speed than the traction members at the other side of said apparatus so that the apparatus may be guided, a screed member vertically adjustable on said framework, and indicating members extending from said apparatus for indicating the height of said screed member and for aiding in guiding said apparatus, said indicating members being adapted to cooperate with level indicating means and guiding means disposed at a predetermined height and extending in a predetermined direction.

19. A road finishing apparatus of the type described comprising a framework, traction members for carrying said framework, a vertically adjustable subframe carried by said framework, means for vertically adjusting said subframe relative to said framework and for rigidly holding it in any position to which it is adjusted, and a road finishing member carried by said subframe and including a plurality of members adapted to contact with the material which is being iinished and which are adjustable vertically relative to said subframe to determine the crown of the road.

LION GARDINER. 

